diff --git a/src/auth/base-auth-api.ts b/src/auth/base-auth-api.ts
index 027245dbf..3f7c6f6e6 100644
--- a/src/auth/base-auth-api.ts
+++ b/src/auth/base-auth-api.ts
@@ -92,6 +92,7 @@ export class BaseAuthAPI extends BaseAPI {
   clientSecret?: string;
   clientAssertionSigningKey?: string;
   clientAssertionSigningAlg?: string;
+  agent?: unknown;
 
   constructor(options: AuthenticationClientOptions) {
     super({
@@ -107,6 +108,7 @@ export class BaseAuthAPI extends BaseAPI {
     this.clientSecret = options.clientSecret;
     this.clientAssertionSigningKey = options.clientAssertionSigningKey;
     this.clientAssertionSigningAlg = options.clientAssertionSigningAlg;
+    this.agent = options.agent;
   }
 
   /**
@@ -122,6 +124,7 @@ export class BaseAuthAPI extends BaseAPI {
       clientSecret: this.clientSecret,
       clientAssertionSigningKey: this.clientAssertionSigningKey,
       clientAssertionSigningAlg: this.clientAssertionSigningAlg,
+      agent: this.agent,
     });
   }
 }
diff --git a/src/auth/client-authentication.ts b/src/auth/client-authentication.ts
index 8af14bcac..d15d99d96 100644
--- a/src/auth/client-authentication.ts
+++ b/src/auth/client-authentication.ts
@@ -17,6 +17,7 @@ interface AddClientAuthenticationOptions {
   clientAssertionSigningKey?: string;
   clientAssertionSigningAlg?: string;
   clientSecret?: string;
+  agent?: unknown;
 }
 
 /**
@@ -26,7 +27,6 @@ interface AddClientAuthenticationOptions {
  * Adds `client_assertion` and `client_assertion_type` for Private Key JWT token endpoint auth method.
  *
  * If `clientAssertionSigningKey` is provided it takes precedent over `clientSecret` .
- * Also skips  `client_secret` & `clientAssertionSigningKey` if request(domain) is of mTLS type
  */
 export const addClientAuthentication = async ({
   payload,
@@ -35,6 +35,7 @@ export const addClientAuthentication = async ({
   clientAssertionSigningKey,
   clientAssertionSigningAlg,
   clientSecret,
+  agent,
 }: AddClientAuthenticationOptions): Promise<Record<string, unknown>> => {
   const cid = payload.client_id || clientId;
   if (clientAssertionSigningKey && !payload.client_assertion) {
@@ -57,16 +58,18 @@ export const addClientAuthentication = async ({
   if (
     (!payload.client_secret || payload.client_secret.trim().length === 0) &&
     (!payload.client_assertion || payload.client_assertion.trim().length === 0) &&
-    !isMTLSRequest(domain)
+    !isMTLSRequest(agent)
   ) {
-    throw new Error('The client_secret or client_assertion field is required.');
+    throw new Error(
+      'The client_secret or client_assertion field is required, or it should be mTLS request.'
+    );
   }
   return payload;
 };
 
 /**
- * Checks if domain name starts with mTLS keyword for mTLS requests
+ * Checks if the request has agent property provided
  */
-const isMTLSRequest = (domain: string): boolean => {
-  return domain.toLowerCase().startsWith('mtls');
+const isMTLSRequest = (agent: unknown): boolean => {
+  return typeof agent === 'undefined' ? false : true;
 };
diff --git a/test/auth/client-authentication.test.ts b/test/auth/client-authentication.test.ts
index cadb359a5..15538f747 100644
--- a/test/auth/client-authentication.test.ts
+++ b/test/auth/client-authentication.test.ts
@@ -111,7 +111,9 @@ describe('client-authentication', () => {
       auth0.oauth.clientCredentialsGrant({
         audience: 'my-api',
       })
-    ).rejects.toThrow('The client_secret or client_assertion field is required.');
+    ).rejects.toThrow(
+      'The client_secret or client_assertion field is required, or it should be mTLS request.'
+    );
   });
 
   it('should allow you to pass your own client assertion', async () => {
@@ -235,10 +237,13 @@ describe('mTLS-authentication', () => {
     jest.clearAllMocks();
   });
 
-  it('should do client credentials grant without client secret or assertion', async () => {
+  it('should do client credentials grant without client secret or assertion & only with agent', async () => {
     const auth0 = new AuthenticationClient({
       domain: 'mtls.tenant.auth0.com',
       clientId,
+      agent: {
+        options: { key: 'my-key', cert: 'my-cert' },
+      },
     });
     await auth0.oauth.clientCredentialsGrant({
       audience: 'my-api',
diff --git a/test/auth/oauth.test.ts b/test/auth/oauth.test.ts
index 0e0cbaa7e..24ca8d13d 100644
--- a/test/auth/oauth.test.ts
+++ b/test/auth/oauth.test.ts
@@ -310,7 +310,9 @@ describe('OAuth', () => {
           response_type: 'code',
           redirect_uri: 'https://example.com',
         } as PushedAuthorizationRequest)
-      ).rejects.toThrow('The client_secret or client_assertion field is required.');
+      ).rejects.toThrow(
+        'The client_secret or client_assertion field is required, or it should be mTLS request.'
+      );
     });
 
     it('should return the par response', async () => {